There are optimized distance calculations for a number of different metrics in Distance.jl: https://github.com/JuliaStats/Distance.jl
On Sunday, May 25, 2014 1:42:15 AM UTC-7, paul analyst wrote: > > How quickly calculate distances arrays etc. > > This is an array of quotients, on the diagonal must be zero. > Are there any features that quickly count this type of arrays? > > Data in F... > > k=size(F,2); > O=zeros(k,k); > for o=0:k-2; > for i=1:k-1-o j=i+1+o; > O[i,j]=sum(F[:,i])/sum(F[:,j]); > O[j,i]=1/O[i,j]; > end; > end; > > Paul >
